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Stockholders’ equity - Noncontrolling interest (Details) - BV LLC - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Oct. 01, 2022
Dec. 31, 2021
Class of Stock [Line Items]    
LLC Interests $ 61,778 $ 59,548
Ownership % 79.60% 79.00%
Continuing LLC Owner    
Class of Stock [Line Items]    
LLC Interests $ 15,787 $ 15,787
Ownership % 20.40% 21.00%
Bioventus and Continuing LLC Owner    
Class of Stock [Line Items]    
LLC Interests $ 77,565 $ 75,335
Ownership % 100.00% 100.00%